A method for transmitting and receiving a signal and an apparatus for transmitting and receiving a signal are disclosed. The method for receiving the signal includes receiving (S210) the signal in a first frequency band, identifying (S220) a first pilot signal including, a cyclic prefix obtained by frequency-shifting a first portion of an useful portion of the first pilot signal and a cyclic suffix obtained by frequency-shifting a second portion of the useful portion of the first pilot signal from the received signal, demodulating (S220) a signal frame including a physical layer pipe (PLP) to which a service stream is converted, by an orthogonal frequency division multiplexing (OFDM) scheme, using information set in the first pilot signal, parsing (S230) the signal frame and obtaining the PLP and obtaining (S240) the service stream from the PLP.
Legal claims defining the scope of protection, as filed with the USPTO.
1. A method for transmitting a signal, the method comprising: encoding service data; building a signal frame including the encoded service data and preamble data, the preamble data comprising an effective portion, a cyclic prefix obtained by frequency-shifting a foremost portion of the effective portion, and a cyclic suffix obtained by frequency-shifting a backmost portion of the effective portion; and transmitting the signal frame.
3. A method for receiving a broadcasting signal, the method comprising: receiving a signal frame including service data and preamble data, the preamble data comprising an effective portion, a cyclic prefix obtained by frequency-shifting a foremost portion of the effective portion, and a cyclic suffix obtained by frequency-shifting a backmost portion of the effective portion; demodulating the received signal frame; and decoding the demodulated signal frame.
5. The method according to claim 3 , wherein the preamble data further comprises at least a first pilot signal or a second pilot signal.
6. The method according to claim 3 , wherein the demodulating the received signal frame comprises: estimating a timing offset or a frequency offset of the received signal frame using the cyclic prefix and the cyclic suffix; and compensating for the estimated offset.
7. An apparatus for transmitting a signal, the apparatus comprising: an encoder configured to encode service data; a builder configured to build a signal frame including the encoded service data and preamble data, the preamble data comprising an effective portion, a cyclic prefix obtained by frequency-shifting a foremost portion of the effective portion, and a cyclic suffix obtained by frequency-shifting a backmost portion of the effective portion; and a transmitter configured to transmit the signal frame.
9. An apparatus for receiving a signal, the apparatus comprising: a receiver configured to receive a signal frame including service data and preamble data, the preamble data comprising an effective portion, a cyclic prefix obtained by frequency-shifting a foremost portion of the effective portion, and a cyclic suffix obtained by frequency-shifting a backmost portion of the effective portion; a demodulator configured to demodulate the received signal frame; and a decoder configured to decode the demodulated signal frame.
11. The apparatus according to claim 9 , wherein the preamble data further comprises at least a first pilot signal or a second pilot signal.
12. The apparatus according to claim 9 , wherein the demodulator comprises: an estimator configured to estimate a timing offset or a frequency offset of the received signal frame using the cyclic prefix and the cyclic suffix; and a compensator configured to compensate for the estimated offset.
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December 11, 2008
February 26, 2013
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